[jira] [Resolved] (MAPREDUCE-2530) TaskTracker jetty stuck in a tight loop

["Thomas Graves (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Graves resolved MAPREDUCE-2530.
--------------------------------------

    Resolution: Duplicate

>  TaskTracker jetty stuck in a tight loop
> ----------------------------------------
>
>                 Key: MAPREDUCE-2530
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2530
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.20.204.0
>            Reporter: Thomas Graves
>            Assignee: Thomas Graves
>
> We are seeing some TaskTracker jetty servers stuck in a tight loop. This appears to be related to Jetty bug 937 (http://jira.codehaus.org/browse/JETTY-937). 
> stack trace for this thread 15993(0x3e79) showing a loop in jetty.
> "21006965@qtp-11400638-0 - Acceptor0 SelectChannelConnector@0.0.0.0:50060" prio=10 tid=0x08e6d400 nid=0x3e79
> runnable [0xaddfb000]
>    java.lang.Thread.State: RUNNABLE
>         at java.lang.Throwable.fillInStackTrace(Native Method)
>         - locked <0xdf2708e8> (a java.io.IOException)
>         at java.lang.Throwable.<init>(Throwable.java:196)
>         at java.lang.Exception.<init>(Exception.java:41)
>         at java.io.IOException.<init>(IOException.java:41)
>         at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>         at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:210)
>         at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
>         at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
>         - locked <0xb6524f58> (a sun.nio.ch.Util$1)
>         - locked <0xb6524f68> (a java.util.Collections$UnmodifiableSet)
>         - locked <0xb6400930> (a sun.nio.ch.EPollSelectorImpl)
>         at sun.nio.ch.SelectorImpl.selectNow(SelectorImpl.java:88)
>         at org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:652)
>         at org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:192)
>         at org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java:124)
>         at org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:708)
>         at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

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